After miniature painting by J. Barry, engraving published by Dr Whitehead for his 'Life of Mr Wesley' (1792), 1792
According to the engraving, John Wesley was 87 years old when Wesley's portrait was taken, which gives good indication of the images's original publication date (c.1790/91.) The engraving is based on a miniature painting by J. Barry and was published in 1792. A number of versions of this engraving dating to the 1790s exist and they were used as the basis for portraits illustrated in later Wesleyan hymn books. See also John Mason's 1846 edition of the 'Collection Of Hymns, For The Use Of The People Called Methodists', in the Online Collection.
The work is in its original frame. The glass is painted in 'verre eglomise', a technique which refers to applying both a design and gilding onto the rear face of glass. This was popularised by the Frenchman Jean-Baptiste Glomy (1711-1786).